Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d216cd3eb866de0…

MALICIOUS

PDF

44.8 KB Created: 2020-08-05 09:25:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 10c6c6effe82504172ac6978a3eed725 SHA-1: 6459d719554675cb215a2a8bc2e9bd58e992f1cc SHA-256: 2d216cd3eb866de0b83ddcf33333960fcecfa49a611a96ca566a756a93910690
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged by a machine learning classifier as malicious. It contains a large number of embedded links, with the primary link pointing to a redirector service (ttraff.ru) that likely obscures the final malicious destination. The document also functions as a link farm, distributing numerous links to external PDF files, many hosted on Shopify domains, which is a common tactic for SEO poisoning and distributing malware.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.ru/pify?keyword=cardiopulmonary+resuscitation+articles+pdf%2529
    • http://files.swanleeartdesign.com/uploads/1/3/1/3/131384573/1891305.pdf
    • http://midurixa.martinisdigz.com/uploads/1/3/1/4/131454012/mepeka-zoginezakekax-kujolifokuxas.pdf
    • http://files.cupe9112.com/uploads/1/3/1/6/131606123/sovivalokevaxesoju.pdf
    • http://fepin.faceoddmasks.com/uploads/1/3/0/7/130739777/827b7bd83a70.pdf
    • https://cdn.shopify.com/s/files/1/0432/7538/7043/files/risiketodaxa.pdf
    • https://cdn.shopify.com/s/files/1/0437/3459/7784/files/minecraft_rpg_server_with_classes.pdf
    • https://cdn.shopify.com/s/files/1/0432/4078/4035/files/brown_and_levinson_s_theory_of_politeness.pdf
    • https://cdn.shopify.com/s/files/1/0428/4389/8022/files/sm_bus_controller.pdf
    • https://cdn.shopify.com/s/files/1/0438/0000/2717/files/attestation_sur_l_honneur_990i_cardif.pdf
    • https://cdn.shopify.com/s/files/1/0435/8438/9275/files/11692142625.pdf
    • https://cdn.shopify.com/s/files/1/0438/3080/4642/files/pajovenagoxapetowux.pdf
    • https://cdn.shopify.com/s/files/1/0432/1853/4557/files/john_deere_lt150_parts.pdf
    • https://cdn.shopify.com/s/files/1/0438/8444/5864/files/86190631883.pdf
    • https://cdn.shopify.com/s/files/1/0431/8868/2915/files/55857388678.pdf
    • https://cdn.shopify.com/s/files/1/0430/9306/5877/files/4844811148.pdf
    • https://cdn.shopify.com/s/files/1/0427/8029/5334/files/xerivinivobixomigid.pdf
    • https://cdn.shopify.com/s/files/1/0429/9807/1449/files/desevonemopalilu.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007094.bin
70db23bc7196ef688ae781503e62dfc41aa99d60025355ba037ea791c9ed1d1b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7094 5384 bytes
font_01_sfnt_off000082dc.bin
323021be022bcb689e5d6328af07c7e61df7250f7961cf3ccd028514e71e5165		 pdf-font-stream PDF embedded font (sfnt) at offset 0x82DC 10244 bytes

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